You don't give much to go on. So, what is causing the problem isn't easy to pinpoint.

So, I'll go out on a limb and assume there's a slight size or aspect mismatch or there's a transparent pixel problem on the edges of the graphics (which are the same aspect as the show), then I'd try to increase the zoom of the layer by 1 or 2 and see what happens. The offending edges should extend past the frame edge.

Sorry am new to this and not really sure how to explain myself yet. I have the slide set up and a background in place, but around the background there is a thick back background. I can live with it but it is driving me crazy looking at it. lol

Is the background you're using an image? In other words, are there two layers in your slide--your photo and then some sort of image you're using as a background? If this is the case, then the black you're seeing is the slide background, which defaults to black. If, as I say, you have an image in layer 2 that you're using as a background, you can do one of two things: crop it to fit either the 4:3 or the 16:9 ratio (whichever format you're using) or you can set it to "Fill frame."